Removal of the Servo Mechanism and Actuator

TASK 25-52-51-000-001-A
Removal of the Servo Mechanism and Actuator

ZONE: 130
ZONE: 150

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 2M (6 FT)
No specific	AR	CAP - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	1	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
130	FWD CARGO COMPT AFT BULKHEAD OF AVNCS COMPT TO FWD PRESSURE BULKHEAD OF WING CENTER BOX
150	AFT CARGO COMPARTMENT FWD PRESS BULKHEAD TO AFT BULKHEAD OF AFT CARGO COMPARTMENT

C. Referenced Information

REFERENCE	DESIGNATION
TASK 25-52-22-000-001-A	Removal of the Ball Mats and the Ball Strips
TASK 52-30-00-860-001-A	Open the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
Door-Sill Latch Lever
Servo Mechanism
Actuators

3. Job Set-up
Subtask 25-52-51-010-050-A ** ON A/C NOT FOR ALL

A. Get Access
(1) Open the forward and/or aft cargo-compartment door(s) (Ref. AMM TASK 52-30-00-860-001).
(2) Put the ACCESS PLATFORM 2M (6 FT) in position at the opening of the forward and/or aft cargo-compartment door(s).
(3) Put the WARNING NOTICE(S) on the control panel of the cargo loading system to tell persons not to use it.

Subtask 25-52-51-865-058-A ** ON A/C NOT FOR ALL

B. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
2000VU	SEMI AUTO CLS-FWD	3MY	E08
2000VU	SEMI AUTO CLS-FWD	2MY	E06
2001VU	SEMI AUTO CLS-AFT	103MY	D08
2001VU	SEMI AUTO CLS-AFT	102MY	D06

Subtask 25-52-51-010-051-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Remove the ball strip and ball mats to get access to the servo mechanism and actuator (Ref. AMM TASK 25-52-22-000-001).

4. Procedure
Subtask 25-52-51-020-054-A ** ON A/C NOT FOR ALL

A. Removal of the Servo Mechanism and Actuator
(1) Remove the door sill latch lever

Door-Sill Latch Lever ** ON A/C NOT FOR ALL

(a) Remove the screw (1) from the protective cover (2).
(b) Remove the protective cover (2) from the servo mechanism.
(c) Remove the electrical connectors (3) from the electrical receptacles (48).
(d) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(e) Remove the Bolt-Retainings (4) from the drawbars (9).
(f) Remove the spring (5) from the door sill latch lever (8).
(g) Remove the screw (6) and the plate (7).
(h) Push the door sill latch lever (8) to the DOWN position to disengage the adjustment pin from the shaft (10).
(i) Lift and remove the door sill latch lever (8) from the shaft (10).
(2) Remove the servo mechanism

Servo Mechanism ** ON A/C NOT FOR ALL

NOTE: To remove the servo mechanism, remove the door sill latch lever, see steps A.1.(a) thru A.1.(i).

(a) Remove the bolts (16).
(b) Remove the screws (18).
(c) Remove the nuts (47) and washers (46).
(d) Remove the screws (45).
(e) Remove the electrical receptacles (48).
(f) Put CAP - BLANKING on the electrical receptacles.
(g) Support the drawbar (20).
(h) Remove and discard the cotter pin (25), the washer (21) and the pin (19).
(i) Remove the drawbar (20) out of the fork end of the actuation lever (23).
(j) Remove the tension spring (26) from the actuation lever (23).
(k) Support the actuation lever (23).
(l) Remove the nut (22) and the washer (24) below the actuation lever (23) from the shaft (10).
(m) Remove the actuation lever (23).
(n) Lift the servo mechanism (27) out of the roller track.
(3) Remove the Actuator 20MY and/or 120MY

Actuators ** ON A/C NOT FOR ALL

(a) Disconnect the electrical connector (33) from the receptacle (34).
(b) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(c) Support the actuator (35) and the drawbar assembly (20).
(d) Remove the screws (32).
(e) Remove the actuator (35) and drawbar assembly (20).

[Rev.10 from 2021] 2026.04.01 06:26:38 UTC